* lib/rubygems: Update RubyGems to master 0886307. This commit

improves documentation and should bring ruby above 75% documented on
  rubyci.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43369 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/test_utilities.rb

@@ -168,6 +168,10 @@ end
 # This class was added to flush out problems in Rubinius' IO implementation.
 
 class TempIO < Tempfile
+
+  ##
+  # Creates a new TempIO that will be initialized to contain +string+.
+
   def initialize(string = '')
     super "TempIO"
     binmode
@@ -175,6 +179,9 @@ class TempIO < Tempfile
     rewind
   end
 
+  ##
+  # The content of the TempIO as a String.
+
   def string
     flush
     Gem.read_binary path